1
# Copyright (C) 2005, 2006 Canonical Ltd
3
# This program is free software; you can redistribute it and/or modify
4
# it under the terms of the GNU General Public License as published by
5
# the Free Software Foundation; either version 2 of the License, or
6
# (at your option) any later version.
8
# This program is distributed in the hope that it will be useful,
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
# GNU General Public License for more details.
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17
from StringIO import StringIO
19
from bzrlib.lazy_import import lazy_import
20
lazy_import(globals(), """
25
from bzrlib.bundle import serializer as _serializer
26
from bzrlib.transport import (
27
do_catching_redirections,
31
from bzrlib.trace import note
34
def read_bundle_from_url(url):
35
return read_mergeable_from_url(url, _do_directive=False)
38
def read_mergeable_from_url(url, _do_directive=True):
39
"""Read mergable object from a given URL.
41
:return: An object supporting get_target_revision. Raises NotABundle if
42
the target is not a mergeable type.
44
url = urlutils.normalize_url(url)
45
url, filename = urlutils.split(url, exclude_trailing_slash=False)
47
# A path to a directory was passed in
48
# definitely not a bundle
49
raise errors.NotABundle('A directory cannot be a bundle')
51
transport = get_transport(url)
52
mergeable, transport = read_mergeable_from_transport(transport, filename,
57
def read_mergeable_from_transport(transport, filename, _do_directive=True):
58
# All of this must be in the try/except
59
# Some transports cannot detect that we are trying to read a
60
# directory until we actually issue read() on the handle.
1
# Copyright (C) 2004 Aaron Bentley <aaron.bentley@utoronto.ca>
3
# This program is free software; you can redistribute it and/or modify
4
# it under the terms of the GNU General Public License as published by
5
# the Free Software Foundation; either version 2 of the License, or
6
# (at your option) any later version.
8
# This program is distributed in the hope that it will be useful,
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
# GNU General Public License for more details.
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20
from bzrlib.trace import mutter
21
from bzrlib.osutils import rename
24
# XXX: mbp: I'm not totally convinced that we should handle conflicts
25
# as part of changeset application, rather than only in the merge
28
"""Represent and apply a changeset
30
Conflicts in applying a changeset are represented as exceptions.
33
__docformat__ = "restructuredtext"
37
class OldFailedTreeOp(Exception):
39
Exception.__init__(self, "bzr-tree-change contains files from a"
40
" previous failed merge operation.")
41
def invert_dict(dict):
43
for (key,value) in dict.iteritems():
48
class ChangeExecFlag(object):
49
"""This is two-way change, suitable for file modification, creation,
51
def __init__(self, old_exec_flag, new_exec_flag):
52
self.old_exec_flag = old_exec_flag
53
self.new_exec_flag = new_exec_flag
55
def apply(self, filename, conflict_handler, reverse=False):
57
from_exec_flag = self.old_exec_flag
58
to_exec_flag = self.new_exec_flag
60
from_exec_flag = self.new_exec_flag
61
to_exec_flag = self.old_exec_flag
63
current_exec_flag = bool(os.stat(filename).st_mode & 0111)
65
if e.errno == errno.ENOENT:
66
if conflict_handler.missing_for_exec_flag(filename) == "skip":
69
current_exec_flag = from_exec_flag
71
if from_exec_flag is not None and current_exec_flag != from_exec_flag:
72
if conflict_handler.wrong_old_exec_flag(filename,
73
from_exec_flag, current_exec_flag) != "continue":
76
if to_exec_flag is not None:
77
current_mode = os.stat(filename).st_mode
81
to_mode = current_mode | (0100 & ~umask)
82
# Enable x-bit for others only if they can read it.
83
if current_mode & 0004:
84
to_mode |= 0001 & ~umask
85
if current_mode & 0040:
86
to_mode |= 0010 & ~umask
88
to_mode = current_mode & ~0111
90
os.chmod(filename, to_mode)
92
if e.errno == errno.ENOENT:
93
conflict_handler.missing_for_exec_flag(filename)
95
def __eq__(self, other):
96
return (isinstance(other, ChangeExecFlag) and
97
self.old_exec_flag == other.old_exec_flag and
98
self.new_exec_flag == other.new_exec_flag)
100
def __ne__(self, other):
101
return not (self == other)
104
def dir_create(filename, conflict_handler, reverse):
105
"""Creates the directory, or deletes it if reverse is true. Intended to be
106
used with ReplaceContents.
108
:param filename: The name of the directory to create
110
:param reverse: If true, delete the directory, instead
117
if e.errno != errno.EEXIST:
119
if conflict_handler.dir_exists(filename) == "continue":
122
if e.errno == errno.ENOENT:
123
if conflict_handler.missing_parent(filename)=="continue":
124
file(filename, "wb").write(self.contents)
129
if e.errno != errno.ENOTEMPTY:
131
if conflict_handler.rmdir_non_empty(filename) == "skip":
136
class SymlinkCreate(object):
137
"""Creates or deletes a symlink (for use with ReplaceContents)"""
138
def __init__(self, contents):
141
:param contents: The filename of the target the symlink should point to
144
self.target = contents
146
def __call__(self, filename, conflict_handler, reverse):
147
"""Creates or destroys the symlink.
149
:param filename: The name of the symlink to create
153
assert(os.readlink(filename) == self.target)
157
os.symlink(self.target, filename)
159
if e.errno != errno.EEXIST:
161
if conflict_handler.link_name_exists(filename) == "continue":
162
os.symlink(self.target, filename)
164
def __eq__(self, other):
165
if not isinstance(other, SymlinkCreate):
167
elif self.target != other.target:
172
def __ne__(self, other):
173
return not (self == other)
175
class FileCreate(object):
176
"""Create or delete a file (for use with ReplaceContents)"""
177
def __init__(self, contents):
180
:param contents: The contents of the file to write
183
self.contents = contents
186
return "FileCreate(%i b)" % len(self.contents)
188
def __eq__(self, other):
189
if not isinstance(other, FileCreate):
191
elif self.contents != other.contents:
196
def __ne__(self, other):
197
return not (self == other)
199
def __call__(self, filename, conflict_handler, reverse):
200
"""Create or delete a file
202
:param filename: The name of the file to create
204
:param reverse: Delete the file instead of creating it
209
file(filename, "wb").write(self.contents)
211
if e.errno == errno.ENOENT:
212
if conflict_handler.missing_parent(filename)=="continue":
213
file(filename, "wb").write(self.contents)
219
if (file(filename, "rb").read() != self.contents):
220
direction = conflict_handler.wrong_old_contents(filename,
222
if direction != "continue":
226
if e.errno != errno.ENOENT:
228
if conflict_handler.missing_for_rm(filename, undo) == "skip":
233
def reversed(sequence):
234
max = len(sequence) - 1
235
for i in range(len(sequence)):
236
yield sequence[max - i]
238
class ReplaceContents(object):
239
"""A contents-replacement framework. It allows a file/directory/symlink to
240
be created, deleted, or replaced with another file/directory/symlink.
241
Arguments must be callable with (filename, reverse).
243
def __init__(self, old_contents, new_contents):
246
:param old_contents: The change to reverse apply (e.g. a deletion), \
248
:type old_contents: `dir_create`, `SymlinkCreate`, `FileCreate`, \
250
:param new_contents: The second change to apply (e.g. a creation), \
252
:type new_contents: `dir_create`, `SymlinkCreate`, `FileCreate`, \
255
self.old_contents=old_contents
256
self.new_contents=new_contents
259
return "ReplaceContents(%r -> %r)" % (self.old_contents,
262
def __eq__(self, other):
263
if not isinstance(other, ReplaceContents):
265
elif self.old_contents != other.old_contents:
267
elif self.new_contents != other.new_contents:
271
def __ne__(self, other):
272
return not (self == other)
274
def apply(self, filename, conflict_handler, reverse=False):
275
"""Applies the FileReplacement to the specified filename
277
:param filename: The name of the file to apply changes to
279
:param reverse: If true, apply the change in reverse
283
undo = self.old_contents
284
perform = self.new_contents
286
undo = self.new_contents
287
perform = self.old_contents
291
mode = os.lstat(filename).st_mode
292
if stat.S_ISLNK(mode):
295
if e.errno != errno.ENOENT:
297
if conflict_handler.missing_for_rm(filename, undo) == "skip":
299
undo(filename, conflict_handler, reverse=True)
300
if perform is not None:
301
perform(filename, conflict_handler, reverse=False)
303
os.chmod(filename, mode)
305
class ApplySequence(object):
306
def __init__(self, changes=None):
308
if changes is not None:
309
self.changes.extend(changes)
311
def __eq__(self, other):
312
if not isinstance(other, ApplySequence):
314
elif len(other.changes) != len(self.changes):
317
for i in range(len(self.changes)):
318
if self.changes[i] != other.changes[i]:
322
def __ne__(self, other):
323
return not (self == other)
326
def apply(self, filename, conflict_handler, reverse=False):
330
iter = reversed(self.changes)
332
change.apply(filename, conflict_handler, reverse)
335
class Diff3Merge(object):
336
def __init__(self, file_id, base, other):
337
self.file_id = file_id
341
def __eq__(self, other):
342
if not isinstance(other, Diff3Merge):
344
return (self.base == other.base and
345
self.other == other.other and self.file_id == other.file_id)
347
def __ne__(self, other):
348
return not (self == other)
350
def apply(self, filename, conflict_handler, reverse=False):
351
new_file = filename+".new"
352
base_file = self.base.readonly_path(self.file_id)
353
other_file = self.other.readonly_path(self.file_id)
360
status = patch.diff3(new_file, filename, base, other)
362
os.chmod(new_file, os.stat(filename).st_mode)
363
rename(new_file, filename)
367
def get_lines(filename):
368
my_file = file(filename, "rb")
369
lines = my_file.readlines()
372
base_lines = get_lines(base)
373
other_lines = get_lines(other)
374
conflict_handler.merge_conflict(new_file, filename, base_lines,
379
"""Convenience function to create a directory.
381
:return: A ReplaceContents that will create a directory
382
:rtype: `ReplaceContents`
384
return ReplaceContents(None, dir_create)
387
"""Convenience function to delete a directory.
389
:return: A ReplaceContents that will delete a directory
390
:rtype: `ReplaceContents`
392
return ReplaceContents(dir_create, None)
394
def CreateFile(contents):
395
"""Convenience fucntion to create a file.
397
:param contents: The contents of the file to create
399
:return: A ReplaceContents that will create a file
400
:rtype: `ReplaceContents`
402
return ReplaceContents(None, FileCreate(contents))
404
def DeleteFile(contents):
405
"""Convenience fucntion to delete a file.
407
:param contents: The contents of the file to delete
409
:return: A ReplaceContents that will delete a file
410
:rtype: `ReplaceContents`
412
return ReplaceContents(FileCreate(contents), None)
414
def ReplaceFileContents(old_contents, new_contents):
415
"""Convenience fucntion to replace the contents of a file.
417
:param old_contents: The contents of the file to replace
418
:type old_contents: str
419
:param new_contents: The contents to replace the file with
420
:type new_contents: str
421
:return: A ReplaceContents that will replace the contents of a file a file
422
:rtype: `ReplaceContents`
424
return ReplaceContents(FileCreate(old_contents), FileCreate(new_contents))
426
def CreateSymlink(target):
427
"""Convenience fucntion to create a symlink.
429
:param target: The path the link should point to
431
:return: A ReplaceContents that will delete a file
432
:rtype: `ReplaceContents`
434
return ReplaceContents(None, SymlinkCreate(target))
436
def DeleteSymlink(target):
437
"""Convenience fucntion to delete a symlink.
439
:param target: The path the link should point to
441
:return: A ReplaceContents that will delete a file
442
:rtype: `ReplaceContents`
444
return ReplaceContents(SymlinkCreate(target), None)
446
def ChangeTarget(old_target, new_target):
447
"""Convenience fucntion to change the target of a symlink.
449
:param old_target: The current link target
450
:type old_target: str
451
:param new_target: The new link target to use
452
:type new_target: str
453
:return: A ReplaceContents that will delete a file
454
:rtype: `ReplaceContents`
456
return ReplaceContents(SymlinkCreate(old_target), SymlinkCreate(new_target))
459
class InvalidEntry(Exception):
460
"""Raise when a ChangesetEntry is invalid in some way"""
461
def __init__(self, entry, problem):
464
:param entry: The invalid ChangesetEntry
465
:type entry: `ChangesetEntry`
466
:param problem: The problem with the entry
469
msg = "Changeset entry for %s (%s) is invalid.\n%s" % (entry.id,
472
Exception.__init__(self, msg)
476
class SourceRootHasName(InvalidEntry):
477
"""This changeset entry has a name other than "", but its parent is !NULL"""
478
def __init__(self, entry, name):
481
:param entry: The invalid ChangesetEntry
482
:type entry: `ChangesetEntry`
483
:param name: The name of the entry
486
msg = 'Child of !NULL is named "%s", not "./.".' % name
487
InvalidEntry.__init__(self, entry, msg)
489
class NullIDAssigned(InvalidEntry):
490
"""The id !NULL was assigned to a real entry"""
491
def __init__(self, entry):
494
:param entry: The invalid ChangesetEntry
495
:type entry: `ChangesetEntry`
497
msg = '"!NULL" id assigned to a file "%s".' % entry.path
498
InvalidEntry.__init__(self, entry, msg)
500
class ParentIDIsSelf(InvalidEntry):
501
"""An entry is marked as its own parent"""
502
def __init__(self, entry):
505
:param entry: The invalid ChangesetEntry
506
:type entry: `ChangesetEntry`
508
msg = 'file %s has "%s" id for both self id and parent id.' % \
509
(entry.path, entry.id)
510
InvalidEntry.__init__(self, entry, msg)
512
class ChangesetEntry(object):
513
"""An entry the changeset"""
514
def __init__(self, id, parent, path):
515
"""Constructor. Sets parent and name assuming it was not
516
renamed/created/deleted.
517
:param id: The id associated with the entry
518
:param parent: The id of the parent of this entry (or !NULL if no
520
:param path: The file path relative to the tree root of this entry
526
self.new_parent = parent
527
self.contents_change = None
528
self.metadata_change = None
529
if parent == NULL_ID and path !='./.':
530
raise SourceRootHasName(self, path)
531
if self.id == NULL_ID:
532
raise NullIDAssigned(self)
533
if self.id == self.parent:
534
raise ParentIDIsSelf(self)
537
return "ChangesetEntry(%s)" % self.id
540
if self.path is None:
542
return os.path.dirname(self.path)
544
def __set_dir(self, dir):
545
self.path = os.path.join(dir, os.path.basename(self.path))
547
dir = property(__get_dir, __set_dir)
549
def __get_name(self):
550
if self.path is None:
552
return os.path.basename(self.path)
554
def __set_name(self, name):
555
self.path = os.path.join(os.path.dirname(self.path), name)
557
name = property(__get_name, __set_name)
559
def __get_new_dir(self):
560
if self.new_path is None:
562
return os.path.dirname(self.new_path)
564
def __set_new_dir(self, dir):
565
self.new_path = os.path.join(dir, os.path.basename(self.new_path))
567
new_dir = property(__get_new_dir, __set_new_dir)
569
def __get_new_name(self):
570
if self.new_path is None:
572
return os.path.basename(self.new_path)
574
def __set_new_name(self, name):
575
self.new_path = os.path.join(os.path.dirname(self.new_path), name)
577
new_name = property(__get_new_name, __set_new_name)
579
def needs_rename(self):
580
"""Determines whether the entry requires renaming.
585
return (self.parent != self.new_parent or self.name != self.new_name)
587
def is_deletion(self, reverse):
588
"""Return true if applying the entry would delete a file/directory.
590
:param reverse: if true, the changeset is being applied in reverse
593
return ((self.new_parent is None and not reverse) or
594
(self.parent is None and reverse))
596
def is_creation(self, reverse):
597
"""Return true if applying the entry would create a file/directory.
599
:param reverse: if true, the changeset is being applied in reverse
602
return ((self.parent is None and not reverse) or
603
(self.new_parent is None and reverse))
605
def is_creation_or_deletion(self):
606
"""Return true if applying the entry would create or delete a
611
return self.parent is None or self.new_parent is None
613
def get_cset_path(self, mod=False):
614
"""Determine the path of the entry according to the changeset.
616
:param changeset: The changeset to derive the path from
617
:type changeset: `Changeset`
618
:param mod: If true, generate the MOD path. Otherwise, generate the \
620
:return: the path of the entry, or None if it did not exist in the \
622
:rtype: str or NoneType
625
if self.new_parent == NULL_ID:
627
elif self.new_parent is None:
631
if self.parent == NULL_ID:
633
elif self.parent is None:
637
def summarize_name(self, reverse=False):
638
"""Produce a one-line summary of the filename. Indicates renames as
639
old => new, indicates creation as None => new, indicates deletion as
642
:param changeset: The changeset to get paths from
643
:type changeset: `Changeset`
644
:param reverse: If true, reverse the names in the output
648
orig_path = self.get_cset_path(False)
649
mod_path = self.get_cset_path(True)
650
if orig_path is not None:
651
orig_path = orig_path[2:]
652
if mod_path is not None:
653
mod_path = mod_path[2:]
654
if orig_path == mod_path:
658
return "%s => %s" % (orig_path, mod_path)
660
return "%s => %s" % (mod_path, orig_path)
663
def get_new_path(self, id_map, changeset, reverse=False):
664
"""Determine the full pathname to rename to
666
:param id_map: The map of ids to filenames for the tree
667
:type id_map: Dictionary
668
:param changeset: The changeset to get data from
669
:type changeset: `Changeset`
670
:param reverse: If true, we're applying the changeset in reverse
674
mutter("Finding new path for %s" % self.summarize_name())
678
from_dir = self.new_dir
680
from_name = self.new_name
682
parent = self.new_parent
683
to_dir = self.new_dir
685
to_name = self.new_name
686
from_name = self.name
691
if parent == NULL_ID or parent is None:
693
raise SourceRootHasName(self, to_name)
696
if from_dir == to_dir:
697
dir = os.path.dirname(id_map[self.id])
699
mutter("path, new_path: %r %r" % (self.path, self.new_path))
700
parent_entry = changeset.entries[parent]
701
dir = parent_entry.get_new_path(id_map, changeset, reverse)
702
if from_name == to_name:
703
name = os.path.basename(id_map[self.id])
706
assert(from_name is None or from_name == os.path.basename(id_map[self.id]))
707
return os.path.join(dir, name)
710
"""Determines whether the entry does nothing
712
:return: True if the entry does no renames or content changes
715
if self.contents_change is not None:
717
elif self.metadata_change is not None:
719
elif self.parent != self.new_parent:
721
elif self.name != self.new_name:
726
def apply(self, filename, conflict_handler, reverse=False):
727
"""Applies the file content and/or metadata changes.
729
:param filename: the filename of the entry
731
:param reverse: If true, apply the changes in reverse
734
if self.is_deletion(reverse) and self.metadata_change is not None:
735
self.metadata_change.apply(filename, conflict_handler, reverse)
736
if self.contents_change is not None:
737
self.contents_change.apply(filename, conflict_handler, reverse)
738
if not self.is_deletion(reverse) and self.metadata_change is not None:
739
self.metadata_change.apply(filename, conflict_handler, reverse)
741
class IDPresent(Exception):
742
def __init__(self, id):
743
msg = "Cannot add entry because that id has already been used:\n%s" %\
745
Exception.__init__(self, msg)
748
class Changeset(object):
749
"""A set of changes to apply"""
753
def add_entry(self, entry):
754
"""Add an entry to the list of entries"""
755
if self.entries.has_key(entry.id):
756
raise IDPresent(entry.id)
757
self.entries[entry.id] = entry
759
def my_sort(sequence, key, reverse=False):
760
"""A sort function that supports supplying a key for comparison
762
:param sequence: The sequence to sort
763
:param key: A callable object that returns the values to be compared
764
:param reverse: If true, sort in reverse order
767
def cmp_by_key(entry_a, entry_b):
772
return cmp(key(entry_a), key(entry_b))
773
sequence.sort(cmp_by_key)
775
def get_rename_entries(changeset, inventory, reverse):
776
"""Return a list of entries that will be renamed. Entries are sorted from
777
longest to shortest source path and from shortest to longest target path.
779
:param changeset: The changeset to look in
780
:type changeset: `Changeset`
781
:param inventory: The source of current tree paths for the given ids
782
:type inventory: Dictionary
783
:param reverse: If true, the changeset is being applied in reverse
785
:return: source entries and target entries as a tuple
788
source_entries = [x for x in changeset.entries.itervalues()
790
# these are done from longest path to shortest, to avoid deleting a
791
# parent before its children are deleted/renamed
792
def longest_to_shortest(entry):
793
path = inventory.get(entry.id)
798
my_sort(source_entries, longest_to_shortest, reverse=True)
800
target_entries = source_entries[:]
801
# These are done from shortest to longest path, to avoid creating a
802
# child before its parent has been created/renamed
803
def shortest_to_longest(entry):
804
path = entry.get_new_path(inventory, changeset, reverse)
809
my_sort(target_entries, shortest_to_longest)
810
return (source_entries, target_entries)
812
def rename_to_temp_delete(source_entries, inventory, dir, temp_dir,
813
conflict_handler, reverse):
814
"""Delete and rename entries as appropriate. Entries are renamed to temp
815
names. A map of id -> temp name (or None, for deletions) is returned.
817
:param source_entries: The entries to rename and delete
818
:type source_entries: List of `ChangesetEntry`
819
:param inventory: The map of id -> filename in the current tree
820
:type inventory: Dictionary
821
:param dir: The directory to apply changes to
823
:param reverse: Apply changes in reverse
825
:return: a mapping of id to temporary name
829
for i in range(len(source_entries)):
830
entry = source_entries[i]
831
if entry.is_deletion(reverse):
832
path = os.path.join(dir, inventory[entry.id])
833
entry.apply(path, conflict_handler, reverse)
834
temp_name[entry.id] = None
837
to_name = os.path.join(temp_dir, str(i))
838
src_path = inventory.get(entry.id)
839
if src_path is not None:
840
src_path = os.path.join(dir, src_path)
842
rename(src_path, to_name)
843
temp_name[entry.id] = to_name
845
if e.errno != errno.ENOENT:
847
if conflict_handler.missing_for_rename(src_path) == "skip":
853
def rename_to_new_create(changed_inventory, target_entries, inventory,
854
changeset, dir, conflict_handler, reverse):
855
"""Rename entries with temp names to their final names, create new files.
857
:param changed_inventory: A mapping of id to temporary name
858
:type changed_inventory: Dictionary
859
:param target_entries: The entries to apply changes to
860
:type target_entries: List of `ChangesetEntry`
861
:param changeset: The changeset to apply
862
:type changeset: `Changeset`
863
:param dir: The directory to apply changes to
865
:param reverse: If true, apply changes in reverse
868
for entry in target_entries:
869
new_tree_path = entry.get_new_path(inventory, changeset, reverse)
870
if new_tree_path is None:
872
new_path = os.path.join(dir, new_tree_path)
873
old_path = changed_inventory.get(entry.id)
874
if bzrlib.osutils.lexists(new_path):
875
if conflict_handler.target_exists(entry, new_path, old_path) == \
878
if entry.is_creation(reverse):
879
entry.apply(new_path, conflict_handler, reverse)
880
changed_inventory[entry.id] = new_tree_path
885
rename(old_path, new_path)
886
changed_inventory[entry.id] = new_tree_path
888
raise Exception ("%s is missing" % new_path)
890
class TargetExists(Exception):
891
def __init__(self, entry, target):
892
msg = "The path %s already exists" % target
893
Exception.__init__(self, msg)
897
class RenameConflict(Exception):
898
def __init__(self, id, this_name, base_name, other_name):
899
msg = """Trees all have different names for a file
903
id: %s""" % (this_name, base_name, other_name, id)
904
Exception.__init__(self, msg)
905
self.this_name = this_name
906
self.base_name = base_name
907
self_other_name = other_name
909
class MoveConflict(Exception):
910
def __init__(self, id, this_parent, base_parent, other_parent):
911
msg = """The file is in different directories in every tree
915
id: %s""" % (this_parent, base_parent, other_parent, id)
916
Exception.__init__(self, msg)
917
self.this_parent = this_parent
918
self.base_parent = base_parent
919
self_other_parent = other_parent
921
class MergeConflict(Exception):
922
def __init__(self, this_path):
923
Exception.__init__(self, "Conflict applying changes to %s" % this_path)
924
self.this_path = this_path
926
class WrongOldContents(Exception):
927
def __init__(self, filename):
928
msg = "Contents mismatch deleting %s" % filename
929
self.filename = filename
930
Exception.__init__(self, msg)
932
class WrongOldExecFlag(Exception):
933
def __init__(self, filename, old_exec_flag, new_exec_flag):
934
msg = "Executable flag missmatch on %s:\n" \
935
"Expected %s, got %s." % (filename, old_exec_flag, new_exec_flag)
936
self.filename = filename
937
Exception.__init__(self, msg)
939
class RemoveContentsConflict(Exception):
940
def __init__(self, filename):
941
msg = "Conflict deleting %s, which has different contents in BASE"\
942
" and THIS" % filename
943
self.filename = filename
944
Exception.__init__(self, msg)
946
class DeletingNonEmptyDirectory(Exception):
947
def __init__(self, filename):
948
msg = "Trying to remove dir %s while it still had files" % filename
949
self.filename = filename
950
Exception.__init__(self, msg)
953
class PatchTargetMissing(Exception):
954
def __init__(self, filename):
955
msg = "Attempt to patch %s, which does not exist" % filename
956
Exception.__init__(self, msg)
957
self.filename = filename
959
class MissingForSetExec(Exception):
960
def __init__(self, filename):
961
msg = "Attempt to change permissions on %s, which does not exist" %\
963
Exception.__init__(self, msg)
964
self.filename = filename
966
class MissingForRm(Exception):
967
def __init__(self, filename):
968
msg = "Attempt to remove missing path %s" % filename
969
Exception.__init__(self, msg)
970
self.filename = filename
973
class MissingForRename(Exception):
974
def __init__(self, filename):
975
msg = "Attempt to move missing path %s" % (filename)
976
Exception.__init__(self, msg)
977
self.filename = filename
979
class NewContentsConflict(Exception):
980
def __init__(self, filename):
981
msg = "Conflicting contents for new file %s" % (filename)
982
Exception.__init__(self, msg)
985
class MissingForMerge(Exception):
986
def __init__(self, filename):
987
msg = "The file %s was modified, but does not exist in this tree"\
989
Exception.__init__(self, msg)
992
class ExceptionConflictHandler(object):
993
"""Default handler for merge exceptions.
995
This throws an error on any kind of conflict. Conflict handlers can
996
descend from this class if they have a better way to handle some or
997
all types of conflict.
999
def missing_parent(self, pathname):
1000
parent = os.path.dirname(pathname)
1001
raise Exception("Parent directory missing for %s" % pathname)
1003
def dir_exists(self, pathname):
1004
raise Exception("Directory already exists for %s" % pathname)
1006
def failed_hunks(self, pathname):
1007
raise Exception("Failed to apply some hunks for %s" % pathname)
1009
def target_exists(self, entry, target, old_path):
1010
raise TargetExists(entry, target)
1012
def rename_conflict(self, id, this_name, base_name, other_name):
1013
raise RenameConflict(id, this_name, base_name, other_name)
1015
def move_conflict(self, id, this_dir, base_dir, other_dir):
1016
raise MoveConflict(id, this_dir, base_dir, other_dir)
1018
def merge_conflict(self, new_file, this_path, base_lines, other_lines):
1020
raise MergeConflict(this_path)
1022
def wrong_old_contents(self, filename, expected_contents):
1023
raise WrongOldContents(filename)
1025
def rem_contents_conflict(self, filename, this_contents, base_contents):
1026
raise RemoveContentsConflict(filename)
1028
def wrong_old_exec_flag(self, filename, old_exec_flag, new_exec_flag):
1029
raise WrongOldExecFlag(filename, old_exec_flag, new_exec_flag)
1031
def rmdir_non_empty(self, filename):
1032
raise DeletingNonEmptyDirectory(filename)
1034
def link_name_exists(self, filename):
1035
raise TargetExists(filename)
1037
def patch_target_missing(self, filename, contents):
1038
raise PatchTargetMissing(filename)
1040
def missing_for_exec_flag(self, filename):
1041
raise MissingForExecFlag(filename)
1043
def missing_for_rm(self, filename, change):
1044
raise MissingForRm(filename)
1046
def missing_for_rename(self, filename):
1047
raise MissingForRename(filename)
1049
def missing_for_merge(self, file_id, other_path):
1050
raise MissingForMerge(other_path)
1052
def new_contents_conflict(self, filename, other_contents):
1053
raise NewContentsConflict(filename)
1058
def apply_changeset(changeset, inventory, dir, conflict_handler=None,
1060
"""Apply a changeset to a directory.
1062
:param changeset: The changes to perform
1063
:type changeset: `Changeset`
1064
:param inventory: The mapping of id to filename for the directory
1065
:type inventory: Dictionary
1066
:param dir: The path of the directory to apply the changes to
1068
:param reverse: If true, apply the changes in reverse
1070
:return: The mapping of the changed entries
1073
if conflict_handler is None:
1074
conflict_handler = ExceptionConflictHandler()
1075
temp_dir = os.path.join(dir, "bzr-tree-change")
62
def get_bundle(transport):
63
return transport.get(filename), transport
65
def redirected_transport(transport, exception, redirection_notice):
66
note(redirection_notice)
67
url, filename = urlutils.split(exception.target,
68
exclude_trailing_slash=False)
70
raise errors.NotABundle('A directory cannot be a bundle')
71
return get_transport(url)
74
f, transport = do_catching_redirections(get_bundle, transport,
76
except errors.TooManyRedirections:
77
raise errors.NotABundle(str(url))
80
from bzrlib.merge_directive import MergeDirective
81
directive = MergeDirective.from_lines(f.readlines())
82
return directive, transport
84
return _serializer.read_bundle(f), transport
85
except (errors.TransportError, errors.PathError), e:
86
raise errors.NotABundle(str(e))
89
# Abstraction leakage, SFTPTransport.get('directory')
90
# doesn't always fail at get() time. Sometimes it fails
91
# during read. And that raises a generic IOError with
92
# just the string 'Failure'
93
# StubSFTPServer does fail during get() (because of prefetch)
94
# so it has an opportunity to translate the error.
95
raise errors.NotABundle(str(e))
96
except errors.NotAMergeDirective:
98
return _serializer.read_bundle(f), transport
1079
if e.errno == errno.EEXIST:
1083
if e.errno == errno.ENOTEMPTY:
1084
raise OldFailedTreeOp()
1089
#apply changes that don't affect filenames
1090
for entry in changeset.entries.itervalues():
1091
if not entry.is_creation_or_deletion():
1092
path = os.path.join(dir, inventory[entry.id])
1093
entry.apply(path, conflict_handler, reverse)
1095
# Apply renames in stages, to minimize conflicts:
1096
# Only files whose name or parent change are interesting, because their
1097
# target name may exist in the source tree. If a directory's name changes,
1098
# that doesn't make its children interesting.
1099
(source_entries, target_entries) = get_rename_entries(changeset, inventory,
1102
changed_inventory = rename_to_temp_delete(source_entries, inventory, dir,
1103
temp_dir, conflict_handler,
1106
rename_to_new_create(changed_inventory, target_entries, inventory,
1107
changeset, dir, conflict_handler, reverse)
1109
return changed_inventory
1112
def apply_changeset_tree(cset, tree, reverse=False):
1114
for entry in tree.source_inventory().itervalues():
1115
inventory[entry.id] = entry.path
1116
new_inventory = apply_changeset(cset, r_inventory, tree.root,
1118
new_entries, remove_entries = \
1119
get_inventory_change(inventory, new_inventory, cset, reverse)
1120
tree.update_source_inventory(new_entries, remove_entries)
1123
def get_inventory_change(inventory, new_inventory, cset, reverse=False):
1126
for entry in cset.entries.itervalues():
1127
if entry.needs_rename():
1128
new_path = entry.get_new_path(inventory, cset)
1129
if new_path is None:
1130
remove_entries.append(entry.id)
1132
new_entries[new_path] = entry.id
1133
return new_entries, remove_entries
1136
def print_changeset(cset):
1137
"""Print all non-boring changeset entries
1139
:param cset: The changeset to print
1140
:type cset: `Changeset`
1142
for entry in cset.entries.itervalues():
1143
if entry.is_boring():
1146
print entry.summarize_name(cset)
1148
class CompositionFailure(Exception):
1149
def __init__(self, old_entry, new_entry, problem):
1150
msg = "Unable to conpose entries.\n %s" % problem
1151
Exception.__init__(self, msg)
1153
class IDMismatch(CompositionFailure):
1154
def __init__(self, old_entry, new_entry):
1155
problem = "Attempt to compose entries with different ids: %s and %s" %\
1156
(old_entry.id, new_entry.id)
1157
CompositionFailure.__init__(self, old_entry, new_entry, problem)
1159
def compose_changesets(old_cset, new_cset):
1160
"""Combine two changesets into one. This works well for exact patching.
1161
Otherwise, not so well.
1163
:param old_cset: The first changeset that would be applied
1164
:type old_cset: `Changeset`
1165
:param new_cset: The second changeset that would be applied
1166
:type new_cset: `Changeset`
1167
:return: A changeset that combines the changes in both changesets
1170
composed = Changeset()
1171
for old_entry in old_cset.entries.itervalues():
1172
new_entry = new_cset.entries.get(old_entry.id)
1173
if new_entry is None:
1174
composed.add_entry(old_entry)
1176
composed_entry = compose_entries(old_entry, new_entry)
1177
if composed_entry.parent is not None or\
1178
composed_entry.new_parent is not None:
1179
composed.add_entry(composed_entry)
1180
for new_entry in new_cset.entries.itervalues():
1181
if not old_cset.entries.has_key(new_entry.id):
1182
composed.add_entry(new_entry)
1185
def compose_entries(old_entry, new_entry):
1186
"""Combine two entries into one.
1188
:param old_entry: The first entry that would be applied
1189
:type old_entry: ChangesetEntry
1190
:param old_entry: The second entry that would be applied
1191
:type old_entry: ChangesetEntry
1192
:return: A changeset entry combining both entries
1193
:rtype: `ChangesetEntry`
1195
if old_entry.id != new_entry.id:
1196
raise IDMismatch(old_entry, new_entry)
1197
output = ChangesetEntry(old_entry.id, old_entry.parent, old_entry.path)
1199
if (old_entry.parent != old_entry.new_parent or
1200
new_entry.parent != new_entry.new_parent):
1201
output.new_parent = new_entry.new_parent
1203
if (old_entry.path != old_entry.new_path or
1204
new_entry.path != new_entry.new_path):
1205
output.new_path = new_entry.new_path
1207
output.contents_change = compose_contents(old_entry, new_entry)
1208
output.metadata_change = compose_metadata(old_entry, new_entry)
1211
def compose_contents(old_entry, new_entry):
1212
"""Combine the contents of two changeset entries. Entries are combined
1213
intelligently where possible, but the fallback behavior returns an
1216
:param old_entry: The first entry that would be applied
1217
:type old_entry: `ChangesetEntry`
1218
:param new_entry: The second entry that would be applied
1219
:type new_entry: `ChangesetEntry`
1220
:return: A combined contents change
1221
:rtype: anything supporting the apply(reverse=False) method
1223
old_contents = old_entry.contents_change
1224
new_contents = new_entry.contents_change
1225
if old_entry.contents_change is None:
1226
return new_entry.contents_change
1227
elif new_entry.contents_change is None:
1228
return old_entry.contents_change
1229
elif isinstance(old_contents, ReplaceContents) and \
1230
isinstance(new_contents, ReplaceContents):
1231
if old_contents.old_contents == new_contents.new_contents:
1234
return ReplaceContents(old_contents.old_contents,
1235
new_contents.new_contents)
1236
elif isinstance(old_contents, ApplySequence):
1237
output = ApplySequence(old_contents.changes)
1238
if isinstance(new_contents, ApplySequence):
1239
output.changes.extend(new_contents.changes)
1241
output.changes.append(new_contents)
1243
elif isinstance(new_contents, ApplySequence):
1244
output = ApplySequence((old_contents.changes,))
1245
output.extend(new_contents.changes)
1248
return ApplySequence((old_contents, new_contents))
1250
def compose_metadata(old_entry, new_entry):
1251
old_meta = old_entry.metadata_change
1252
new_meta = new_entry.metadata_change
1253
if old_meta is None:
1255
elif new_meta is None:
1257
elif (isinstance(old_meta, ChangeExecFlag) and
1258
isinstance(new_meta, ChangeExecFlag)):
1259
return ChangeExecFlag(old_meta.old_exec_flag, new_meta.new_exec_flag)
1261
return ApplySequence(old_meta, new_meta)
1264
def changeset_is_null(changeset):
1265
for entry in changeset.entries.itervalues():
1266
if not entry.is_boring():
1270
class UnsuppportedFiletype(Exception):
1271
def __init__(self, full_path, stat_result):
1272
msg = "The file \"%s\" is not a supported filetype." % full_path
1273
Exception.__init__(self, msg)
1274
self.full_path = full_path
1275
self.stat_result = stat_result
1277
def generate_changeset(tree_a, tree_b, interesting_ids=None):
1278
return ChangesetGenerator(tree_a, tree_b, interesting_ids)()
1280
class ChangesetGenerator(object):
1281
def __init__(self, tree_a, tree_b, interesting_ids=None):
1282
object.__init__(self)
1283
self.tree_a = tree_a
1284
self.tree_b = tree_b
1285
self._interesting_ids = interesting_ids
1287
def iter_both_tree_ids(self):
1288
for file_id in self.tree_a:
1290
for file_id in self.tree_b:
1291
if file_id not in self.tree_a:
1296
for file_id in self.iter_both_tree_ids():
1297
cs_entry = self.make_entry(file_id)
1298
if cs_entry is not None and not cs_entry.is_boring():
1299
cset.add_entry(cs_entry)
1301
for entry in list(cset.entries.itervalues()):
1302
if entry.parent != entry.new_parent:
1303
if not cset.entries.has_key(entry.parent) and\
1304
entry.parent != NULL_ID and entry.parent is not None:
1305
parent_entry = self.make_boring_entry(entry.parent)
1306
cset.add_entry(parent_entry)
1307
if not cset.entries.has_key(entry.new_parent) and\
1308
entry.new_parent != NULL_ID and \
1309
entry.new_parent is not None:
1310
parent_entry = self.make_boring_entry(entry.new_parent)
1311
cset.add_entry(parent_entry)
1314
def iter_inventory(self, tree):
1315
for file_id in tree:
1316
yield self.get_entry(file_id, tree)
1318
def get_entry(self, file_id, tree):
1319
if not tree.has_or_had_id(file_id):
1321
return tree.tree.inventory[file_id]
1323
def get_entry_parent(self, entry):
1326
return entry.parent_id
1328
def get_path(self, file_id, tree):
1329
if not tree.has_or_had_id(file_id):
1331
path = tree.id2path(file_id)
1337
def make_basic_entry(self, file_id, only_interesting):
1338
entry_a = self.get_entry(file_id, self.tree_a)
1339
entry_b = self.get_entry(file_id, self.tree_b)
1340
if only_interesting and not self.is_interesting(entry_a, entry_b):
1342
parent = self.get_entry_parent(entry_a)
1343
path = self.get_path(file_id, self.tree_a)
1344
cs_entry = ChangesetEntry(file_id, parent, path)
1345
new_parent = self.get_entry_parent(entry_b)
1347
new_path = self.get_path(file_id, self.tree_b)
1349
cs_entry.new_path = new_path
1350
cs_entry.new_parent = new_parent
1353
def is_interesting(self, entry_a, entry_b):
1354
if self._interesting_ids is None:
1356
if entry_a is not None:
1357
file_id = entry_a.file_id
1358
elif entry_b is not None:
1359
file_id = entry_b.file_id
1362
return file_id in self._interesting_ids
1364
def make_boring_entry(self, id):
1365
cs_entry = self.make_basic_entry(id, only_interesting=False)
1366
if cs_entry.is_creation_or_deletion():
1367
return self.make_entry(id, only_interesting=False)
1372
def make_entry(self, id, only_interesting=True):
1373
cs_entry = self.make_basic_entry(id, only_interesting)
1375
if cs_entry is None:
1378
full_path_a = self.tree_a.readonly_path(id)
1379
full_path_b = self.tree_b.readonly_path(id)
1380
stat_a = self.lstat(full_path_a)
1381
stat_b = self.lstat(full_path_b)
1383
cs_entry.metadata_change = self.make_exec_flag_change(stat_a, stat_b)
1385
if id in self.tree_a and id in self.tree_b:
1386
a_sha1 = self.tree_a.get_file_sha1(id)
1387
b_sha1 = self.tree_b.get_file_sha1(id)
1388
if None not in (a_sha1, b_sha1) and a_sha1 == b_sha1:
1391
cs_entry.contents_change = self.make_contents_change(full_path_a,
1397
def make_exec_flag_change(self, stat_a, stat_b):
1398
exec_flag_a = exec_flag_b = None
1399
if stat_a is not None and not stat.S_ISLNK(stat_a.st_mode):
1400
exec_flag_a = bool(stat_a.st_mode & 0111)
1401
if stat_b is not None and not stat.S_ISLNK(stat_b.st_mode):
1402
exec_flag_b = bool(stat_b.st_mode & 0111)
1403
if exec_flag_a == exec_flag_b:
1405
return ChangeExecFlag(exec_flag_a, exec_flag_b)
1407
def make_contents_change(self, full_path_a, stat_a, full_path_b, stat_b):
1408
if stat_a is None and stat_b is None:
1410
if None not in (stat_a, stat_b) and stat.S_ISDIR(stat_a.st_mode) and\
1411
stat.S_ISDIR(stat_b.st_mode):
1413
if None not in (stat_a, stat_b) and stat.S_ISREG(stat_a.st_mode) and\
1414
stat.S_ISREG(stat_b.st_mode):
1415
if stat_a.st_ino == stat_b.st_ino and \
1416
stat_a.st_dev == stat_b.st_dev:
1419
a_contents = self.get_contents(stat_a, full_path_a)
1420
b_contents = self.get_contents(stat_b, full_path_b)
1421
if a_contents == b_contents:
1423
return ReplaceContents(a_contents, b_contents)
1425
def get_contents(self, stat_result, full_path):
1426
if stat_result is None:
1428
elif stat.S_ISREG(stat_result.st_mode):
1429
return FileCreate(file(full_path, "rb").read())
1430
elif stat.S_ISDIR(stat_result.st_mode):
1432
elif stat.S_ISLNK(stat_result.st_mode):
1433
return SymlinkCreate(os.readlink(full_path))
1435
raise UnsupportedFiletype(full_path, stat_result)
1437
def lstat(self, full_path):
1439
if full_path is not None:
1441
stat_result = os.lstat(full_path)
1443
if e.errno != errno.ENOENT:
1448
def full_path(entry, tree):
1449
return os.path.join(tree.root, entry.path)
1451
def new_delete_entry(entry, tree, inventory, delete):
1452
if entry.path == "":
1455
parent = inventory[dirname(entry.path)].id
1456
cs_entry = ChangesetEntry(parent, entry.path)
1458
cs_entry.new_path = None
1459
cs_entry.new_parent = None
1461
cs_entry.path = None
1462
cs_entry.parent = None
1463
full_path = full_path(entry, tree)
1464
status = os.lstat(full_path)
1465
if stat.S_ISDIR(file_stat.st_mode):
1471
# XXX: Can't we unify this with the regular inventory object
1472
class Inventory(object):
1473
def __init__(self, inventory):
1474
self.inventory = inventory
1475
self.rinventory = None
1477
def get_rinventory(self):
1478
if self.rinventory is None:
1479
self.rinventory = invert_dict(self.inventory)
1480
return self.rinventory
1482
def get_path(self, id):
1483
return self.inventory.get(id)
1485
def get_name(self, id):
1486
path = self.get_path(id)
1490
return os.path.basename(path)
1492
def get_dir(self, id):
1493
path = self.get_path(id)
1498
return os.path.dirname(path)
1500
def get_parent(self, id):
1501
if self.get_path(id) is None:
1503
directory = self.get_dir(id)
1504
if directory == '.':
1506
if directory is None:
1508
return self.get_rinventory().get(directory)
added
removed
bzrlib/changeset.py
